11 february 2019


\[ PGR = \frac{P(t_2) - P(t_1)}{P(t_1)(t_2 - t_1)} \]
[1] https://www.kaggle.com/fernandol/countries-of-the-world [2] https://data.worldbank.org/
[3] https://www.ecology.com/population-estimates-year-2050/
[4] https://en.wikipedia.org/wiki/Demographic_transition